import java.util.Arrays;

/**
 * @author gao
 * @date 2025/11/5 10:05
 */

public class Solution {
    public int[] productExceptSelf(int[] nums) {
        int n = nums.length;
        int[] f = new int[n];
        int[] g = new int[n];

        f[0] = g[n - 1] = 1;

        for (int i = 1; i < n; i++) {
            f[i] = f[i - 1] * nums[i - 1];
        }

        for (int i = n - 2; i >= 0; i--) {
            g[i] = g[i + 1] * nums[i + 1];
        }

        int[] ret = new int[n];
        for (int i = 0; i < n; i++) {
            ret[i] = f[i] * g[i];
        }

        return ret;
    }

    public static void main(String[] args) {
        int[] nums = {1, 2, 3, 4};
        Solution solution = new Solution();
        System.out.println(Arrays.toString(solution.productExceptSelf(nums)));
    }
}